<!doctype html>
<html>
<head>
	<meta charset="utf-8">
	<title>样式的优先级</title>
	<style>
	div{ color:red; }
 	p{ color:green !important; }
	.active{ color:blue; } 
	#content{ color:yellow; }
</style>
	</head>
 <body>
<p id="content" class="active" style="color:gray;">这是一个段落</p>
	</body>
</html>

